Sean Casten (born November 23, 1971) is an American scientist, entrepreneur in the clean‑energy sector, and Democratic politician. He was elected to the U.S. House of Representatives in 2018 and represents a suburban district west of Chicago. Casten is best known for bringing technical and business experience in energy efficiency and emissions reduction to his work in Congress and public policy.

Background and career before politics

Casten trained and worked in scientific and technical roles before becoming an entrepreneur. He founded and led companies that developed energy efficiency projects and technologies aimed at reducing industrial emissions and recovering waste heat to generate power. His private‑sector work focused on deploying commercially proven solutions to cut greenhouse gases and lower energy costs for facilities.

Congressional service and policy focus

After defeating an incumbent in the 2018 midterm election, Casten took office as a member of the U.S. House of Representatives. He represents Illinois’ 6th District, a largely suburban area that has been competitive in recent cycles; readers can learn more about the area through resources on Illinois' 6th congressional district. In Congress he emphasizes climate policy, clean‑energy deployment, innovation in technology, and practical market and regulatory measures to reduce emissions.

Positions, initiatives, and approach

Casten frames his policy work around the intersection of science, technology, and public policy. He advocates for federal investment in research and infrastructure for clean energy, supports incentives for efficiency and electrification, and typically promotes private‑sector solutions alongside public programs. While affiliated with the Democratic Party, he often highlights technical and economic pathways to achieve environmental goals.

Significance and notable facts

  • He is notable as one of a group of members of Congress with direct technical and entrepreneurial experience in clean energy.
  • Casten's background shapes his emphasis on practical, technically informed policy rather than purely ideological approaches.
  • He has participated in legislative and oversight discussions about energy, emissions, and the transition to lower‑carbon systems.

Outside of public office, Casten has engaged in public commentary, briefings, and advocacy related to climate science and clean technology. He lives in Illinois and continues to describe his career as bridging scientific training, business experience, and public service.